GameShark Codes for:

18 Wheeler: American Pro Trucker

Effect                                   Code

[M] Must Be First                        9C5D88F8
  
[M] Must Be Last                         245EECA9
  
Max Cash                                 6A8C763205F5E0FF

Must Be On                               2458C4A900000002
  
Inf Time Arcade                          F294B9A300000009
                                         331EA94800000009

Inf Time Parking                         C8CAF77E00000009
                                         8C9C7A4800000009
                                         A6ADE1DA00000009
  
Time 0:00:00 Parking                     D6CA9BFA00000009
  
Inf Time Score Attack                    4B5ACED700000009